We all use Fiverr app, but are you sure you are online in the app. please open your app and go to settings, check whether your ‘show online’ option is switched on or off. By default it remains switched off. If it is off, then you will remain offline despite of keeping your app open. So, if you want to remain online most of the time, switch on your ‘show online’ status.
Thank you with noted.
You sir, are a genius!